CPEB4 and neoplasm: Similarly, these subcutaneous tumours were subjected to immunohistochemical staining, and the results showed that the protein levels of CPEB4 and Vimentin were significantly upregulated in the circESRP1 overexpression vector group and that cotransfection with sh-CPEB4 partially reversed the effects, while the protein level of E-cadherin showed the opposite trend (Fig. 7h).